[owenversteeg]

From the diagram, this seems like it wouldn't be terribly hard to DIY: you can take an off the shelf heat exchanger and a fan, then all you'd need is the centrifuge part and tubing for the pressurized gas.

Would there be any special considerations in DIYing this that I'm overlooking? The only part that I can see being tricky is the centrifuge mechanism and sealing the bottom of that to a compressed air tube... not quite sure how to build that (presumably it'd have to withstand both high RPM and high pressure.)

Obviously a trompe is pretty easy to DIY if you have a steady stream of water and some serious elevation change, but the vast majority of places don't have that.

[pacaro]

Building a DIY centrifuge is a great way to become a Darwin award candidate.

[owenversteeg]

Eh, build it at small enough scale and encase it in metal and you'll be fine.